Fix drop position calculations

git-svn-id: svn://sunsvr01.isp.uni-luebeck.de/swproj13/trunk@199 72836036-5685-4462-b002-a69064685172

2 files changed, 41 insertions, 35 deletions

diff --git a/src/jrummikub/model/Hand.java b/src/jrummikub/model/Hand.java
index 73ffab5..644ae94 100644
--- a/src/jrummikub/model/Hand.java
+++ b/src/jrummikub/model/Hand.java
@@ -3,4 +3,8 @@ package jrummikub.model;
 /** Class managing a {@link Player}'s {@link Stone}s */
 public class Hand extends StoneTray<Stone> implements IHand {
 
+	@Override
+	protected Position fixInvalidDrop(Stone stone, Position pos) {
+		return null;
+	}
 }
diff --git a/src/jrummikub/model/StoneTray.java b/src/jrummikub/model/StoneTray.java
index 94b09be..52079d0 100644
--- a/src/jrummikub/model/StoneTray.java
+++ b/src/jrummikub/model/StoneTray.java
@@ -11,7 +11,7 @@ import jrummikub.util.Pair;
  * or {@link StoneSet}s.
  * 
  * @param <E>
- *            Type of positioned objects (must implement Sizeable)
+ *          Type of positioned objects (must implement Sizeable)
  */
 public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 	protected HashMap<E, Pair<E, Position>> objects = new HashMap<E, Pair<E, Position>>();
@@ -22,11 +22,6 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 		LEFT, RIGHT, TOP, BOTTOM;
 	}
 
-	/*
-	 * (non-Javadoc)
-	 * 
-	 * @see jrummikub.model.IStoneTray#pickUp(jrummikub.model.Position)
-	 */
 	@Override
 	public E pickUp(Position position) {
 		for (Map.Entry<E, Pair<E, Position>> i : objects.entrySet()) {
@@ -39,12 +34,10 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 			if (position.getY() < currentPosition.getY()) {
 				continue;
 			}
-			if (position.getX() > currentPosition.getX()
-					+ currentObject.getWidth()) {
+			if (position.getX() > currentPosition.getX() + currentObject.getWidth()) {
 				continue;
 			}
-			if (position.getY() > currentPosition.getY()
-					+ currentObject.getHeight()) {
+			if (position.getY() > currentPosition.getY() + currentObject.getHeight()) {
 				continue;
 			}
 			// Position is inside the current object
@@ -54,11 +47,6 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 		return null;
 	}
 
-	/*
-	 * (non-Javadoc)
-	 * 
-	 * @see jrummikub.model.IStoneTray#drop(E, jrummikub.model.Position)
-	 */
 	@Override
 	public void drop(E object, Position position) {
 		if (object != null) {
@@ -68,32 +56,35 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 
 	@SuppressWarnings("unchecked")
 	private void drop(E object, Position position, Direction direction) {
+		objects.put(object, new Pair<E, Position>(object, position));
 		for (Pair<E, Position> i : ((Map<E, Pair<E, Position>>) objects.clone())
 				.values()) {
-			Position currentPosition = i.getSecond();
+			Direction newDirection = direction;
 			E currentObject = i.getFirst();
-			if (!objectsOverlap(object, position, currentObject,
-					currentPosition)) {
+			if (currentObject == object)
+				continue;
+			Position currentPosition = getPosition(currentObject);
+			if (!objectsOverlap(object, position, currentObject, currentPosition)) {
 				continue;
 			}
 			// Object would be placed inside the current object
-			if (direction == null) {
-				direction = getMoveDirection(object, position, i);
+			if (newDirection == null) {
+				newDirection = getMoveDirection(object, position, i);
 			}
 			Position newPosition = null;
 			// Move object to avoid overlap
-			switch (direction) {
+			switch (newDirection) {
 			case TOP:
-				newPosition = new Position(currentPosition.getX(),
-						position.getY() - currentObject.getHeight());
+				newPosition = new Position(currentPosition.getX(), position.getY()
+						- currentObject.getHeight());
 				break;
 			case BOTTOM:
-				newPosition = new Position(currentPosition.getX(),
-						position.getY() + object.getHeight());
+				newPosition = new Position(currentPosition.getX(), position.getY()
+						+ object.getHeight());
 				break;
 			case LEFT:
-				newPosition = new Position(position.getX()
-						- currentObject.getWidth(), currentPosition.getY());
+				newPosition = new Position(position.getX() - currentObject.getWidth(),
+						currentPosition.getY());
 				break;
 			case RIGHT:
 				newPosition = new Position(position.getX() + object.getWidth(),
@@ -101,10 +92,23 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 				break;
 			}
 
-			objects.remove(i.getFirst());
+			objects.remove(currentObject);
 			drop(currentObject, newPosition, direction);
 		}
-		objects.put(object, new Pair<E, Position>(object, position));
+	}
+
+	/**
+	 * Checks whether the object may be placed on the given position, computes new
+	 * position if not
+	 * 
+	 * @param object
+	 *          to be dropped
+	 * @param p
+	 *          the object is dropped at
+	 * @return null if the drop is valid, new position otherwise
+	 */
+	protected Position fixInvalidDrop(E object, Position pos) {
+		return null;
 	}
 
 	/** Tests whether two objects overlap **/
@@ -156,15 +160,13 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 		float blockingRight = blocking.getSecond().getX()
 				+ blocking.getFirst().getWidth();
 		float overlapRight = Math.min(objectRight, blockingRight);
-		float overlapLeft = Math.max(position.getX(), blocking.getSecond()
-				.getX());
+		float overlapLeft = Math.max(position.getX(), blocking.getSecond().getX());
 		float overlapX = overlapRight - overlapLeft;
 		float objectBottom = position.getY() + object.getHeight();
 		float blockingBottom = blocking.getSecond().getY()
 				+ blocking.getFirst().getHeight();
 		float overlapBottom = Math.min(objectBottom, blockingBottom);
-		float overlapTop = Math
-				.max(position.getY(), blocking.getSecond().getY());
+		float overlapTop = Math.max(position.getY(), blocking.getSecond().getY());
 		float overlapY = overlapBottom - overlapTop;
 		// vertical or horizontal Shift
 		// TODO magic factor
@@ -207,11 +209,11 @@ public class StoneTray<E extends Sizeable> implements IStoneTray<E> {
 		try {
 			StoneTray<E> copy = (StoneTray<E>) super.clone();
 			copy.objects = (HashMap<E, Pair<E, Position>>) objects.clone();
-			
+
 			return copy;
 		} catch (CloneNotSupportedException e) {
 			e.printStackTrace();
-			
+
 			return null;
 		}
 	}